refactor(common): Remove currency pipe depreciation notice about the default currency (#48872)

Currency pipe won't be using the LOCALE_ID to determine the default currency.

fixes #47612

PR Close #48872

Author: JeanMeche

aio/content/guide/deprecations.md

@@ -43,7 +43,6 @@ v15 - v18
 | Area                                | API or Feature                                                                                             | Deprecated in | May be removed in |
 |:---                                 |:---                                                                                                        |:---           |:---               |
 | `@angular/common`                   | [`ReflectiveInjector`](#reflectiveinjector)                                                                |  v8           | v11               |
-| `@angular/common`                   | [`CurrencyPipe` - `DEFAULT_CURRENCY_CODE`](api/common/CurrencyPipe#currency-code-deprecation)              |  v9           | v11               |
 | `@angular/core`                     | [`DefaultIterableDiffer`](#core)                                                                           |  v7           | v11         |
 | `@angular/core`                     | [`ReflectiveKey`](#core)                                                                                   |  v8           | v11         |
 | `@angular/core`                     | [`RenderComponentType`](#core)                                                                             |  v7           | v11         |
@@ -144,7 +143,6 @@ In the [API reference section](api) of this site, deprecated APIs are indicated
 
 | API                                                                                           | Replacement                                         | Deprecation announced | Details |
 |:---                                                                                           |:---                                                 |:---                   |:---     |
-| [`CurrencyPipe` - `DEFAULT_CURRENCY_CODE`](api/common/CurrencyPipe#currency-code-deprecation) | `{provide: DEFAULT_CURRENCY_CODE, useValue: 'USD'}` | v9                    | From v11 the default code is extracted from the locale data given by `LOCALE_ID`, rather than `USD`. |
 | [`NgComponentOutlet.ngComponentOutletNgModuleFactory`](api/common/NgComponentOutlet)          | `NgComponentOutlet.ngComponentOutletNgModule`       | v14                   | Use the `ngComponentOutletNgModule` input instead. This input doesn't require resolving NgModule factory. |
 | [`DatePipe` - `DATE_PIPE_DEFAULT_TIMEZONE`](api/common/DATE_PIPE_DEFAULT_TIMEZONE) |`{ provide: DATE_PIPE_DEFAULT_OPTIONS, useValue: { timezone: '-1200' }` | v15                    | Use the `DATE_PIPE_DEFAULT_OPTIONS` injection token, which can configure multiple settings at once instead. |
 

packages/common/src/pipes/number_pipe.ts

@@ -176,25 +176,6 @@ export class PercentPipe implements PipeTransform {
  * that determine group sizing and separator, decimal-point character,
  * and other locale-specific configurations.
  *
- * {@a currency-code-deprecation}
- * <div class="alert is-helpful">
- *
- * **Deprecation notice:**
- *
- * The default currency code is currently always `USD` but this is deprecated from v9.
- *
- * **In v11 the default currency code will be taken from the current locale identified by
- * the `LOCALE_ID` token. See the [i18n guide](guide/i18n-common-locale-id) for
- * more information.**
- *
- * If you need the previous behavior then set it by creating a `DEFAULT_CURRENCY_CODE` provider in
- * your application `NgModule`:
- *
- * ```ts
- * {provide: DEFAULT_CURRENCY_CODE, useValue: 'USD'}
- * ```
- *
- * </div>
  *
  * @see `getCurrencySymbol()`
  * @see `formatCurrency()`